Mold.



MOLD.

APPLICATION 'FILED DEG. 8, 1911.

1,041,991, Patented oet. 22, 1912.

2 SHEETS-SHEET 1,

H. T. FROST.'

MOLD. v APPLICATION FILED DEG. B, 1911.

mgwgm Patented Oct. 22, 1912.

2 SHEETSSHBET 2.

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HUT/VESSES Learner HOB-TIO 'El FROST, OF VIVEAN, SOUTH DAKOTA.

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Specification of Letters Patent.

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Application filed December 8; 1911. Serial No. 664,850.

,To all whom it lmay concern:

being provided with means for contracting and removing the core and the side members of -the mold from the wall after it has been formed and set. 4

Another object oi' the invention is to provide'improved means i`or moving the side members of a mold away from the molded article and simultaneously withdrawing the core of the mold.

These and other objects may be attained by means of the construction illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a mold mdc in accordance with my invention; Fig. 2 is a top plan view ot the same; Fig. 3 is an end viewothe mold in position for recei 'ng the concrete; Fig. a is a similar view showing the side members of the mold and the core moved to a position to permit the mold to be removed from the molded wall.

My present invention is designed as an improvement on certain features illustrated in my Patentsi, dated July 26, 1910.

leterringto ,the drawings, the numerals 1 designate vertical upright members of a trame Aand secured to the inner sides near the lower ends of said upright members are longitudinal boards or molding plates 2 for theorie-r and inner sides of the wall. EX-

tending across above the boards 2 and pivot ally. connected to the uprights 1 are cross bars 3, one at each end of the mold, said cross bars being pivotally connected at 1 to the uprights 1 and provided witha series of periterations 5 for permitting adjustment as to thickness or the wall desired. Near-'the center of the'cross bar 3 slots 6 are provided and extendingthrough said slots are studs 7 formed on or connected to the core members 8, said studs forming pivotal points for said members and permitting the. same to move toward and from each rotheri- The members 8 are thicker at theirflbtvereiids and somewhat thinner at their upperends, and mounted between themmbers 8 is an expander or Wedge 9, said Wedge being connected to rods 10 and said rods having rings or loops 11 at their upper ends which surround the longitudinal rod 12, as shown more clearly in Figs. 1 and 2. At the upper ends of the members 1 end links or sectional cross-bars 1.3-14 are pivoted ony the bolts 1'5 and said cross bars are each provided With perforations 16 to permit adjustment one toward and Jfrom the other for forming thicker or thinner wall members. The longitudinal rod 12 extends through members 13444A and is pivoted thereto as at 17. A Stop lug 1S is formed on or .connected to the member 13.

The operation ot' my invention may be briefly described as follows: YWhen the mold is in the position shown inliigs. 1 and 3 the Concrete material is inserted between the boardsl2 and the members 8 to form two separate Walls. When the concrete material has become set and in condition for removing the mold, the rod 12 is raised to the po-a sition shown in Fig. 1 oto simultaneously throw the boards 2 outward from the molded Wall and to throw the members S inward to permit the mold to be removed or raised for another tier of the wall.

From the foregoing, it will be obvious that my present invention is of simple c0nstruction, can be operated quickly and Will insure smooth surfaced walls having a ventilating opening or dead air space in the center thereof.

claim:

1. A mold for ventilated concrete walls comprising uprights having molding boards or plates connected thereto a cross bar on which thev uprights are jivoted, core members pivotally suspendell from said cross bar, a movable`wedge or expander mounted betweenV the core members 4and provided with suspension rods, a longitudinal rod on which said core. rods are mounted and cross bars at the end of the -frame pivotally connectedV together for raising`the core wedge and simultaneously Lthrowing the mold boards or plates away from the molded wall,

2. Aemold for concrete walls comprising.. 110

molding boards or plates uprights having l cross bar on which Sald connected thereto, a

uprghs are pvoedg tapering core members Suspended xfom Sad eroes bei', a, core Wedge movable between Said @oye members, and meen-s for smulnneosly loosening 'the Cove members and moving 1he n'xodng u'lembers away from the l'lshed WML y v3. A meid for' eonel'eie ventilated Walls eolnprsing; upl'lghts, molding 'boards or platee. connected thereto, @roes 'bars con neeted 'fo Said uprlghts at pomts nem.' the center thereofZ tapering mold members pwoed. in slots 'm sind emes belg means for I f Lee-@eee l edjustng the moding `Zoomds nwzudly' and bers and moving the molding boards away from the moed Wall. y

In estmony Whel'eof I ax my signature in preeence of two Witnesses.

HORATIO T. FRU-j'i. 'Wi 'messes t TROS. REGMER, A. 0. GHESON. 

